Tus nqi rau Sulfur Black tau txo qis thaum ntxov lub lim tiam no, vim tias muaj kev pab cuam ntawm cov khoom siv raw khoom luv luv.Qhov kev txo qis no tuaj yeem suav tias yog qhov hloov pauv ntawm qhov tsis tu ncua ntawm tus nqi nce ntxiv hauv ob peb lub hlis dhau los.

TIANJIN LEADING ib txwm nyob ntawm no muab cov nqi sib tw rau cov khoom zoo Sulfur Black rau peb cov neeg siv khoom.